8086 assembly mov instruction not error

Question

Im write this code in 8086 emulator and emulate but not give any error why?

org 100h

mov 1ah,dh

ret

edit: this is the emulate output

Answer 1

emu8086 changed mov 1ah,dh to mov [1ah],dh . With square brackets it means: store DH to the memory at address DS:001A ( not 0001A ). I'd like to say that this behavior is a bug.